WO2000070910A2 - Enceintes acoustiques - Google Patents

Enceintes acoustiques Download PDF

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Publication number
WO2000070910A2
WO2000070910A2 PCT/GB2000/001665 GB0001665W WO0070910A2 WO 2000070910 A2 WO2000070910 A2 WO 2000070910A2 GB 0001665 W GB0001665 W GB 0001665W WO 0070910 A2 WO0070910 A2 WO 0070910A2
Authority
WO
WIPO (PCT)
Prior art keywords
panel
core
softening point
structural
panels
Prior art date
Application number
PCT/GB2000/001665
Other languages
English (en)
Other versions
WO2000070910A3 (fr
Inventor
Charles Bream
Original Assignee
New Transducers Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB9911158.5A external-priority patent/GB9911158D0/en
Priority claimed from GBGB9911356.5A external-priority patent/GB9911356D0/en
Application filed by New Transducers Limited filed Critical New Transducers Limited
Priority to AU47670/00A priority Critical patent/AU4767000A/en
Publication of WO2000070910A2 publication Critical patent/WO2000070910A2/fr
Publication of WO2000070910A3 publication Critical patent/WO2000070910A3/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • B60R11/0217—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for loud-speakers
    • B60R11/0223—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for loud-speakers of flat type
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R2011/0042—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means
    • B60R2011/0043—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means for integrated articles, i.e. not substantially protruding from the surrounding parts
    • B60R2011/0045—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means for integrated articles, i.e. not substantially protruding from the surrounding parts with visible part, e.g. flush mounted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • B60R2011/0294—Apparatus with multi-functionalities, e.g. radio and telephone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction

Definitions

  • the invention relates to loudspeakers and more particularly to bending-wave panel loudspeakers, e.g. of the kind described in International patent application O97/09842 and to methods of making such loudspeakers. Loudspeakers as described in WO97/09842 are known as
  • thermoforming the object from a thermoformable panel material By semi- structural' object is meant an object which has some structural significance although having a significant non- structure role.
  • an automobile interior trim panel is primarily decorative in nature but nevertheless may be used as a carrier for controls such as door and window opening mechanisms, handles etc and may carry electrical wiring and sound-proofing.
  • the thermoformable panel material may be a sandwich panel, e.g. having face skins separated by a core or maybe a solid laminate.
  • thermoplastic materials has the added benefit of reducing the panel manufacturing cycle time from hours (thermosets require 30-60 minutes at high temperature) to minutes (thermoplastics usually require 5-25 seconds) , making these panels more amenable to high volume production.
  • thermoformable panels The main requirement for thermoformable panels is the specification of materials that can be reformed under heat and pressure. Generally these are:
  • Thermoplastic-based faceskins e.g. polymer films or fibre- reinforced polymers.
  • Thermoplastic cores e.g. foam or honeycomb.
  • the main benefit of this type of panel is that a panel manufacturer could produce a range of flat-panels. These could then be used directly as flat panels or formed into structures .
  • the complexity of the formed component could vary from local forming, e.g. the formation of domes at the exciter position to complete forming of the panel e.g. to form a door trim.
  • the main requirements are to heat the faceskins to above their softening point (Tg) and to heat the core to just below its softening point (Tg) .
  • the panel can then be shaped by pressing in a cold matched tool, using a tensioning frame to prevent faceskin wrinkling.
  • the other type of formable reinforced faceskin would be the use of random short fibre veils.
  • the advantage of this material, over short fibre fabrics, is that veils are available in very low weights (_> 25 gsm) , making them more suitable for small panels.
  • the main requirement of the core material is that the softening point (Tg) of the core is greater than or equal to that of the faceskin. This means that, under the correct processing conditions, the core can be formed' without collapse of the cell structure resulting in a uniform thickness throughout the shaped component. However, in certain applications collapse/compression of the core may be used to 'isolate' the bending-wave panel from the main structure.
  • Tg softening point
  • Table 2 A list of several potential thermoplastic core materials is listed in Table 2.
  • Thermoplastic film adhesives are available in two main forms, i.e. films and webs. These are frequently used in the manufacture of interior car trims to bond the fabric lining to the main panel. The main requirement, when shaping sandwich panels, is for the adhesive to soften at the forming temperature.
  • thermoplastic-based panels are : 1. Shaped panels can be produced from flat 'blanks' (the level of double-curvature achievable is dependent on the reinforcement form) .
  • thermoset -based panels (applies to flat panels as well as complex shapes) .
  • the level of acoustic damping in the panel can be controlled by altering the weight and type of thermoplastic adhesive.
  • the ability to locally compress the core material enables a non-structural bending-wave loudspeaker panel to be incorporated into a structural component, without changing the basic configuration of the structural panel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

L'invention concerne un procédé pour la fabrication d'objet structurel ou semi-structurel (par exemple, panneau de garnissage pour intérieur de véhicule), dans lequel est intégré un panneau d'enceinte acoustique à onde de flexion, le procédé consistant en un thermoformage de l'objet à partir d'un panneau thermoformable.
PCT/GB2000/001665 1999-05-14 2000-05-15 Enceintes acoustiques WO2000070910A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU47670/00A AU4767000A (en) 1999-05-14 2000-05-15 Loudspeakers

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB9911158.5A GB9911158D0 (en) 1999-05-14 1999-05-14 Loudspeakers
GB9911158.5 1999-05-14
GBGB9911356.5A GB9911356D0 (en) 1999-05-18 1999-05-18 Loudspeakers
GB9911356.5 1999-05-18

Publications (2)

Publication Number Publication Date
WO2000070910A2 true WO2000070910A2 (fr) 2000-11-23
WO2000070910A3 WO2000070910A3 (fr) 2001-04-05

Family

ID=26315543

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/001665 WO2000070910A2 (fr) 1999-05-14 2000-05-15 Enceintes acoustiques

Country Status (3)

Country Link
AU (1) AU4767000A (fr)
TW (1) TW488184B (fr)
WO (1) WO2000070910A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1271997A3 (fr) * 2001-06-18 2004-09-08 Pioneer Corporation Membrane de haut-parleur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2731579A3 (fr) * 1995-03-10 1996-09-13 Focal Procede de fabrication d'une membrane pour haut-parleurs et membrane obtenue
WO1997009842A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Dispositif acoustique
WO1999011490A1 (fr) * 1997-09-03 1999-03-11 New Transducers Limited Panneau de garniture avec systeme acoustique integre
GB2341511A (en) * 1998-09-14 2000-03-15 New Transducers Ltd The diaphragm of a sandwich-construction panel-form loudspeaker has collapsed edges

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57152794A (en) * 1981-03-17 1982-09-21 Onkyo Corp Production of diaphragm for speaker
JPS57155899A (en) * 1981-03-20 1982-09-27 Matsushita Electric Ind Co Ltd Diaphragm for speaker
JPS62193498A (ja) * 1986-02-20 1987-08-25 Mitsubishi Electric Corp ハニカム振動板の製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2731579A3 (fr) * 1995-03-10 1996-09-13 Focal Procede de fabrication d'une membrane pour haut-parleurs et membrane obtenue
WO1997009842A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Dispositif acoustique
WO1999011490A1 (fr) * 1997-09-03 1999-03-11 New Transducers Limited Panneau de garniture avec systeme acoustique integre
GB2341511A (en) * 1998-09-14 2000-03-15 New Transducers Ltd The diaphragm of a sandwich-construction panel-form loudspeaker has collapsed edges

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 006, no. 254 (E-148), 14 December 1982 (1982-12-14) & JP 57 152794 A (ONKYO KK), 21 September 1982 (1982-09-21) *
PATENT ABSTRACTS OF JAPAN vol. 006, no. 259 (E-149), 17 December 1982 (1982-12-17) & JP 57 155899 A (MATSUSHITA DENKI SANGYO KK), 27 September 1982 (1982-09-27) *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 044 (E-581), 9 February 1988 (1988-02-09) & JP 62 193498 A (MITSUBISHI ELECTRIC CORP), 25 August 1987 (1987-08-25) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1271997A3 (fr) * 2001-06-18 2004-09-08 Pioneer Corporation Membrane de haut-parleur

Also Published As

Publication number Publication date
AU4767000A (en) 2000-12-05
TW488184B (en) 2002-05-21
WO2000070910A3 (fr) 2001-04-05

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